We Have a log home , built in 1986 we put a product called velvet heart wood cedar oil based stain on about every 5 years, The first 15 to 20 years the stain was very water resistant to rain ,but now after 2 years the logs look dry and lack the oily finish to resist rain, would you have a recommendation of a product to bring the water resistant finish Some one suggested Linseed oil, would like help getting the right product Thank you Bob